Supporting pin for insulators



May 4 1926.

L. E. HENDEE SUPPORTING PIN FOR msumron;

Filed March 8; 1922 WITNESSES w a /f w Patented May 4, 19255.

LEM E. HENDEE, OF MILVAUKEE, XVISCONSIN/ASSIGNOR T0 LINE MATERIAL COM- PANY, OF SOUTH MILXVAUKEE, "I CON' IN, A CQETPORATTON OF VJISCGNSIN.

SUPPORTING PIN FOR INSULATORS.

Application filed March 8, 1922.

7 '0 all whom it may concern:

Be it known that I, LEM l-lnnnnn, a citizen of the United States, and resident of Milwaukee, in the county of Milwaukee and State of .Visconsin, have invented new and useful Improvements in Supporting Pins for Insulators, of which the following is a description, reference being had to the accompanying drawings, which are a part of this specification.

The invention relates to supporting pins for insulators. One of the objects of the invention is to provide an insulator pin which may be readily applied to a cross-arm or other support upon which it is desired to mount the insulator and which by the clamping action of its parts will be flrmly secured to the cross-arm, the construction also permitting the pin being applied to cross-arms of different sizes.

lVith the above and other objects in view the invention consists in the insulator pin hereinafter described and all equivalents.

In the drawings: Fig. 1 is an end view of an insulator pin embodying the invention, parts being shown in section; Fig. 2 is a section taken on the line 22 of Fig. 1; Fig. 3 is a detail top View of the pin; Fig. 1 is a detail sectional view taken on the line 1-4 of Fig. 1.

The insulator pin includes a pair of spaced supporting arms 5 which are here shown as formed integral with a head 6 though they are capable of flexing in the region of their connection with the head for purposes hereinafter described. These arms have inwardly projecting reinforcing ribs 7 extending from the head to inwardly extending clamping flanges 8, the ribs 7 adjacent said flanges being forked, as at 9, to provide a passage for a clamping bolt 10 which also passes through bosses 11 formed in the arms. The lower ends of the arms are in the form of hooks 12 and reinforcing ribs 13 extend from these ends to the bosses 11. The crossarm-engaging surfaces 1 1 of the flanges 8 are preferably curved or inclined upwardly so as to present wedge surfaces to the crossarm.

Clamping members 15 have stirrups or yoke portions 16 engaging the hooks 12. These members have cross-arm engaging parts 17 and end parts 18 extending at an angle to the parts 17 and apertured to re- Serial No. 5421 17.

eeive a clamping bolt 19. The parts 17 and 18 are reinforced by ribs 20.

The head 6 of the pin is of hollow cylindrical form having diametrically disposed recesses 21 in its top, and a soft metal thimble 22 is formed by casting it about the head and overthe top thereof so that pertions 28 of said thimble are disposed in the recesses 21 to more firmly anchor said thimble in place, the thimble being exteriorly threaded to receive the insulator 2 1.

ith the above construction the spaced arms 5 are placed over the cross-arm and the nut for the bolt 10 drawn up to bring the arms against opposite sides of the crossarms, the clamping members 15 are then hooked onto the hooks 12 and the bolt 19 passed through, and on drawing up the nut of this bolt the pressure exerted by the bolt against the parts 18 swings the parts 17 up into engagement with the cross-arm and at the same time the opposite side is engaged by the surfaces 1 1, and also the swinging of the members 15 draws the side portions of the arms 5 into engagement with the crossarm so that the cross-arm is firmly clamped between the flanges 8, the sides of the arms 5 and the members 15. The swinging members 15 with the bolt 19 form a toggle clamp and permit a great clamping pressure being efl'ected between the supporting pin and the cross-arm. As the arms 5 are capable of flexing in the region of their connection with the head they may be spread apart or drawn together within certain limits to accommodate ditferent sizes of cross-arms and also permit of ready application to the cross-arm. The relative movement of the arm 5 may, of course, be effected in other ways without departing from the invention.

What I claim as my invention is:

1. In an insulator pin, the combination. of a pair of spaced and relatively movable pin-supporting arms provided with clamping flanges, clamping members pivotally connected to the lower ends of said arms and adapted to swing with respect thereto into clamping engagement with the support on which the pin is mounted, and a bolt having end thrust engagement with said members for swinging said members into clamping engagement with the support.

2. In an insulator pin, the combination of a pair of spaced and relatively movable pin-supporting arms having cross-arm engaging portions, a clamping bolt passing through the intermediate portion of said arms, a pair of pivoted clamping members operatively connected to the end portions of said arms, and a bolt for moving said clamping members into engagement with the cross-arm.

3. In an insulator pin, the combination of a pair of spaced and relatively novable pin-supporting arms provided with crossarm engaging portions, a clamping bolt passing tnrongh the intermediate portion of said arms, hooks on said arms, clamping iembers having yoke portions en 'ageable with said hooks, and a bolt passing irough said clamping members and exerting pressure thereon to swing said members into clamping engagement with the crosaarm.

i. In an insulator pin, the combination of a pair of spaced and relative movable pin-supporting arms forming a for adapted to straddle a eross-arm, reintoro ing ribs extending longitudinally of said arms, flanges on said arms having inclined cross-arm engaging surfaces, a bolt passing through said arms adjacent said surfaces i'or drawing said arms against opposite messes sides of the cros -arm, and means at the free e ds of said arms for moving said inclined surfaces into we dging and clampingengagement with the cross-arr 5. In an insulator pin, the combination :t a pair of spaced piirsnpporting arms provided with cross-arm engaging portions, hooks on said arms, clamping members having yoke portions engageable with said. hooks, and a belt for movin said clamping members into engagement with the crossarm.

6. In an insulator pin, the combination or a pin member having an insuiator-reoeiving head portion and arms integra there with but movable relative to each other and forming an open-ended fork adapted to straddle a or ssarm, acqnstable cramping means connecting the free ends oi said arms drawing them together into clamping O with the cross-arm, and a 

